Tetrastichus howardi (Olliff) (Hymenoptera: Eulophidae), a hyperparasitoid of tachinid natural enemies of elicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) in India

    Tawar, K B and Jadhav, D R and Armes, N J (1996) Tetrastichus howardi (Olliff) (Hymenoptera: Eulophidae), a hyperparasitoid of tachinid natural enemies of elicoverpa armigera (Hubner) (Lepidoptera: Noctuidae) in India. Journal of Biological Control, 10 (1-2). pp. 9-13. ISSN 2230-7281

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    Abstract

    Tetrastichus howardi was identified as a hyperparasitoid of the tachinids Goniophthalmus halli and Senometopia illota, both parasitoids of Helicoverpa armigera pupae, in pigeon pea fields in southern India. Fifty-nine percent of G. halli and S. illota pupae were parasitized by T. howardi, resulting in a hyperparasitism rate of 1.9%. Unlike previous studies, T. howardi was not recorded as a primary parasitoid of H. armigera pupae. Rather than behaving as a pupal guild parasitoid, the data suggest that T. howardi oviposit in the larval stage of tachinid parasitoids while they are developing inside H. armigera pupae. The fact that T. howardi was not a primary parasitoid of H. armigera pupae suggests that this species is able to distinguish between parasitised and unparasitized H. armigera pupae.

    Item Type: Article
    Divisions: UNSPECIFIED
    CRP: UNSPECIFIED
    Uncontrolled Keywords: Goniophthalmus halli, Helicoverpa armigera, hyperparasitoid, pupal parasitoids,Senometopia illota,Tetrastichus howardi
    Subjects: Mandate crops > Chickpea
    Mandate crops > Pigeonpea
    Depositing User: Mr Siva Shankar
    Date Deposited: 12 Dec 2011 10:57
    Last Modified: 14 Dec 2011 04:52
    URI: http://oar.icrisat.org/id/eprint/4923
    Official URL: http://indianjournals.com/ijor.aspx?target=ijor:jb...
    Projects: Adaptive Research Initiative of the UK, Government's Overseas Development Administration.
    Funders: Natural Resources Institute, Overseas Development Bank
    Acknowledgement: Parasitoids were identified through the insect identification service of the Natural History Museum, UK. Financial support was provided by the Natural Resources Institute, UK, through an Adaptive Research Initiative of the UK Government's Overseas Development Administration.
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